Clutch



l (Remodel.) unam-sheet 1.

G.BENDBR.

GLUTGH. l No. 477,985b l Patented June 28, 1892.

' (No Model.) 4 sheets-.sheen 2.

G. BENDER.

' CLUTCH.

No. 477,935. 'PtentedJune z8, 1892.

- WITNESSES: I

By M .lttornay me News Perini co.. moro-uma, wnamxucn n c (No Model.) G'BENDE'R' sheets-snm a. CLUTCH. No.`477,985. Patented June 28, 1802.

INVENTOR (ewm Attorney.

(No Model.) 4 sheets-sheet 4.

G.BBNDER. n CLUTCH.

PatentedJun 28,V 13927.

No.. 477,985; 5 /vg;

WITNE SES:

m no nms versn oo., Fabro-Luna, wAsmNcYoN, n. c.

.j UNITEIZ#I STATEsf-PATENT OFFICE.'

GEORGE BENDER, oEBEooK-LYN, NEW YORK.

' CLUTCH.

SPECIFICATION forming pm of Letters Patent No. 477,985, dated June '28,1892.

applicanthaaren-my18,1891.` Seriana. 381,824. (Nomea-.1J

-' .To-all inkom it may con/cern.-Y

' Be it known that I, GEORGE BENDR, a citi-L zen of. the UnitedStates,residing at Brooklyn., Kings county, vNew York, have invented certainImprovements jin Automatically-Opf erating PositiveIfriction-Clutches,of which the followingis a specification. 1 My invention relates in themain to that class l of friction-clutches which arepositive in theiraction: anddo not depend altogether upon the friction between the .twoclutch-surfaces for their action, but wherein saidfsurfaces positivelyengage one another, friction being em-f ployed ,only to lessen-the noiseand strainj caused by the impact between the moving suface and thestationary surface at the moment of starting of themachine ordrivenshaft;

The object of my invention is in part to provide a friction-clutch otthis general char-` acter which shall be both noiseless and positive inits action and which shall be especially;

applicable teso-called stop-motions or mech-` anisms such as 'areemployed to stop the ro-` tating cam-shaft or driving-shaft of4 variousmachines-such as type-casting, button-making machines, dac-while someoperation not requiring the'working of said machine or its elements isin progress, such as Vthe coolin of the molten material, dic.

My invention also contemplates .means whereby said clutch may berendered operative or inoperative automatically, according as theoperation of the machine may require, as well as the provision `ofmeans-of adjustment whereby said clutch may be renderedloperative orinoperative duringdifferenttimes and at different times in therevolution of the shaft. z

My invention will be hereinafter fully described, and its novel featurescarefully de-` fined in the claims.

' In order that my invention may be the betff-ter understood, I haveillustrated in the accompanying drawings a part of the frame of 'somemachine to which my improvements have been applied, but.- have, omittedall parts of such machine which are not connected therewith directly.iu` order to render said draw- Y ings as simple as possible.

Figure l of said drawings is a side view of in the oppositedirection,the frame being re- Figs. 7, 8, and 9 are detail views showingthe parts in different positions,'which will be hereinafter referred to.I.

In the drawings,Arepresents the machineframe, herein shown in part only,as said frame may be ofv any construction, or may be a part of theframeof the machine to which my improvements are applied. Journaledinbearings at A on this frame is the machineshaft B, which bears at itsprojecting free end the elements of the clutch, herein shown in the formof tight and loose pulleys D and C, respectively. These pulleys, asherein shown, are constructed of a solid web and periphery, the loose.pulley or driving element C being hollowed out on that face which liesnext to pulley or disk D in order to form an inclosing casing fortheworking parts therein. The driving element C is somewhat wider thanpulley D, beingnecesscd about its periphery in order to receive a-.belt.C from a counter-shaft below, (notfslnowm) and in order to prevent saiddriving element C from working lengthwise along shaft B, I prefer toprovide said shaftwitlraset-collar b. Pulley D is keyed orotherwisesecured to the end of shaft- B in order that the two may rotatetogether. On the inner face of the driving element C arepivotedhreeclutch blocks orshoes c c,'whicl11 are all exactly alike both in formand operation', and as onlyone of these blocks is'in operation at onetime I will describe but one of them, setting forthhereinafterthedifference'inoperation when two or three are in actionfrom that where but one is in action.'V rllhe block c consists, asherein shown, of a at metal plate of sufficient strength to sustain thestrain upon it at the starting of, the machine-shaft, and is pivoted atcX tothe solid web of. element C,

being provided with a-screW-threaded shank c2 on that side which liesagainst said web, which shank projects through a slot 02X in the web andreceives a set-nut c3 outside for setting the block in position onthe'vweb of the pulley. When the block is to be set in itsV operativeposition, the set-nut c3 is loosened and the block c allowed to fall thelength of IOO y is set at the outer end of said slot- 02X.

the slot in which the screw-threaded shank jects a stout clutch-shoe o',provided with a' smooth curved bearing or clutch-face cx, which face ison that side of shoe c nearest the pulley-axis. The curve of saidsurface eX when the block is set in its inoperative position isconcentric with the curved periphery of the driving element or pulley C,but when said block is in its operative position said surface iseccentric to said periphery,-said block falling from its pivot c as acenter.

On the inner hollowed face of pulley .D is pivoted a second clutch blockor member d of the clutch, which is very similar in form to the blocks oand is pivoted at (ZX to the web of the pulley D. Thisblock dis alsoprovided with a clutch or bearing surface cl ,the curve vof whichcorresponds with the curve of the surface cX on shoe c, but which is,however, on the outer side of shoe d or that sidelfacing surface cX whenthe shoes are in engagement. On the inner face of block d is secured arounded nose of hardened steel by preference, which, when said block isin its operative position, rests between two adjacent teeth of one orthe other of two toothed wheels e and f. A springl, secured to asuitable projection cast on the inner face of the web of pulley D,

the studs c5 on block c, so that as said block` passes around during therotation of the d riving element C it will through its stud c5 impartone-sixth of a revolution to star-wheel c forpurposes'tobeexplained.Thestem gpasses through the web of pulleyD and through an inclosingsleeve D thereon and is adapted to be set in or out at varying positionsfor purposes of adjustment, which I will hereinafter describe.

In order to secure stem g in position when set, it is provided at theproper points along its length with three annular grooves g g2 g3, whichcoincide as the stein is pushedin orv drawn out with an opening orsaw-cut DX in A spring E, secured the wall of sleeve D. on the boss ofpulley D, is arranged to bear at its free end in said opening DX and inthat one of the grooves on stein g which may be beneath it, thus holdingsaid stem firmly in place while allowing it to be drawn out or ing, thenose cl3 will rest between the teeth of Wheelf. WVhen the stem is drawnout to its fullest extent, the star-wheel k will be withdrawn out of thepath of the studs c5, and said studs will pass around during therotation of the driving element without actuating the mechanism.

On its outer end, beyond the nose d3, the clutch-block dV is providedwith a depending finger or projection d4, which is arranged in the pathof the upper end of a lever or lifter h, pivoted at h on the boss ofpulley D,the upper end of which is kept pressed in or toward the drivingelement C by a leaf-spring LX, set on the casing and arranged to bearunder saidflever beyond the pivot hX thereof. Said upper arm h of leverh is of an L shape, and its angular portion h2 projects out th rough anopening D2 in the web of pulley D and bears on its outerside atripper-plate or buffer i, provided with. an inclined volutebearingsurface i', which as the pulley D rotates strikes upon aninclined bearing-plate j, fixed on a bracket J on frame A. Thebearing-surface j of plate j is inclined or beveled in the oppositedirection to the surface t" ou buffer i, and consequently as the pulleyD rotates the two surfaces j and t" will contact, and butter i will bedrawn out laterally away from pulley D by reason of such inclinescompressing spring h within said pulley.

I will now describe the operation of the devices, premising that onlyone of the blocks c is in its operative position, the other two beingset up concentrically with the periphery of the driving element C, asseen in Fig. 2.

Rotary motion is imparted to the driving element from the counter-shaft(not shown) through the medium of the belt C. As said element rotates(in the direction of arrowa: in Fig. 2) the block c (seen at y, thisbeing` the one set in its operative position) moves around until its pinc5 impinges against one of the teeth of the six-toothed star-Wheel 7a onstem g. This star-wheel beine` secured to the wheels e and f, said sterng being, as represented in Fig. 5, set so as to bring Wheel e, which hassix teeth also, under the nose (Z3, said wheel 7c, together with wheele, will be rotated one-sixth of a revolution, raising said nose, as seenin full lines in Fig. 2. The upper end of the lifter 7L will now bepressed under the projecting linger d4 on block d, said lifter havingpreviously been prevented from passing under said finger by the loweredposition of block CZ. Said block will now be upheld in its elevatedposition by the lifter h, and/as the shoe c is brought around by thecontinued rotation of the element C the bearing-surface c thereof willimpinge upon the bearing-surface c X of shoe cl', and the pulley D willalso IOO IOS

IIO

Y noise and strain of the working'parts.

be put into rotaryrmotion. The. elasticity of the parts will allow thesurfaces cx and c "f to'slide over one another, and this sliding`motion, or rather the friction between-said surfaces beforethe positivefinal engagement of the shoes, will to 'a greatextent reduce the Now thepulleys and of course the shaft B move around together' for a fullrevolution or until the tripper t comes into contact with plate j,

when the opposite inclineson said partswill draw the end h2 of lever 7Loutward from the face of pulley D, compressing spring hx until the upperend h of said lever passes outof the plane of the armd4 on the block d,when saidblock will fall by the pressure of the spring Z thereabove, thenose d3 againpeutering between the next two teeth, of Wheel e, as willAbe readily understood. Now, the slices cand d lbeing no longer inengagement, the rotation of pulley D and shaft B will cease; butin orderto insure the immediate cessation of the motion of pulley D and shaft Bafter the shoes have been disengaged I prefer to provide the brakedevice illustrated in Fig. l, wherein. a leaf-spring m, bent into a Ushape and secured at one end to a tie-bar A2v of frame A, bears atitsfree end a brakeshoe m', which pressesY elastically upon theperiphery of pulley D at all times, and in order that the pressure ofsaid shoe m. may be adjusted to a nicety I prefer to provideanadjusting-screw m2, Vwhich passes through said bar A2 and presses at itstip against the free end of spring m.' \Vhen.all three of said blocks care set inoperative position, the operation will be as follows:Thedriving element C will first communicate one entire revolution topulley D and shaft B, then there will be a stop in the motion of` saidshaft of one-third of a revolution, then a complete revolution', then astop ofone-third o'f a revolution, then a complete revolution, and,

finally a stop of one-third of a revolution.v

Then but two of' the shoes are in theirgoperative positions, there willfirst be communicated to shaft B one complete revolution, then a stop ofa third of a-revolution, then another full revolution, and then anotherstop of tWothirds of a revolution. Vhen all three shoes are set in theirinoperative positions, of course there will be no rotary motion impartedto shaft B. V

In order to .further vary the movements imparted to shaft B, I haveprovided the stem g, bearing. the two wheels e and f, before referredto. The Wheel e, as before stated, has

six teeth, and its function is to raise the block d each time the studc5 passes around and actuates the star-wheel la; but the wheel f hasonly three teeth, although these` teeth are of the same length vas theteeth of wheel e. Vhen the stem g is pushed in so as to. bring wheel funder the nose clthe duration of the stop in the shaft B wi-ll beincreased onefull revolution, as will be readily understood, for saidwheel having but three teeth the pin c5 at the time of `first actuatingstar-wheel- 7c will only serve to bring the next tooth on said Wheel upto they nose cl3, but will' not serve 7o to carry it thereu nder in;order to set the shaft in motion. At the next fullrevolution, h'owever,the tooth of wheelL f beingup against the nose cl3, said tooth will becarried under said nose, raising thelatter and allowing the lifter htobe pressed by its spring in under finger d4,- whereby the block d isheld in its raised position and the shoes will engage and shaft -Breceive rotary motion.V

Of coursev I'do not-wish to be understood as 8o limiting myself to anyparticular number or arrangement of the blocks cor any particular numberor arrangementof the'teetlrof the wheels e and Las these may be variedaccording aslthe Working ofthe machinel to which my invention is appliedmay require.

The form of the parts herein shown is not essential to my invention,particularly that of' pulley C and disk D. The Aconstruction hereinillustrated, .however,z1is especially 9o adapted. for the purpose forwhichit is def` signed, saidpulley and disk forming Aa convenientinclosing casing for the Working parts. However, this casing maybedispensed with 'and the clutch members be secured di- 9.5

rectly to the respective shafts in some cases; nor do I wishfto belunderstood as limiting myself to that .particular device herein shownfor engaging and disengaging the clutchshoes automatically; but thatillustrated herei oo driven or machine shaft providedvwith the iro othermember or shoe of the clutch, said shoes being provided witheccentrically-set clutchfaces, substantially as described, and movingand adapted to engage one another ina path at right angles tothe axisofy rotation,.and 115 means, substantially as described, for throwingsaid .shoes into or out of engagement, substantially as and for thepurposes set forth.

2. In. a-positive friction-clutch, the combination, with the drivingelement provided 12o with one set of shoes or members of the clutch, ofthe driven or machine shaftprovided with the other member or shoe of theclutch, said shoes being providedwith eccentrically-set clutch-faces,substantiallyY as described; and 125 moving and adapted to engage#4 onseanother ina path at right angles to theaxis ofrotation,means,-substantially as described, for setting either of theshoes on the driving element into or outzof operative position, and 13omeans,I substantiallyas described, for throwing saidshoeon the. drivenshaft into or out of operative position, substantially as and for` thepurposes setforth. f. 4 f

described my invention, I

